If I'm powering them from the PSU, should I be powering each one independently? Or is it ok to power the one in the bottom of the case direct from PSU molex, and then link the rest of them up by connecting them to one another?

You can connect the fan molexes together, I do it for my radiator fans. You essential are creating a parallel string of fans.

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In terms of electricity, am I creating a series or parallell circuit? If I'm creating a series circuit it makes sense that there was a problem as the voltage would drop towards the last fan, and the voltage would differ from the motherboard circuit.

I really need to brush up on my electronics if I'm to continue building my PC's.

You are correct, a series connection would be bad. There are no series power connections in PC since you want all devices to have the same voltage, whether it be 12V or 5V ect.

You can connect the fan molexes together, I do it for my radiator fans. You essential are creating a parallel string of fans.

You are correct, a series connection would be bad. There are no series power connections in PC since you want all devices to have the same voltage, whether it be 12V or 5V ect.

So it is safe to connect them all using one 12v molex direct from PSU. Thank you! I'm still baffled as to why my board died in that case, though I have been reading your interesting posts.. It was definitely a result of plugging into that 3 pin fan connector, as the rig was powering up fine until I made that final connection. It powered up for a split second and then died. And it definitely is a fan connector, and I definitely connected it the right way, just to confirm

I would doubt your processor got hurt, they're a lot harder to completely kill than you might think.

Replace the motherboard and you should be good to go

This has happened to a lot of people with these Asus boards. More than likely your mobo may have taken your cpu; it's like 50/50. Asus really dropped the ball with these P67 boards as this has nothing to do with the SATA ports.

This has happened to a lot of people with these Asus boards. More than likely your mobo may have taken your cpu; it's like 50/50. Asus really dropped the ball with these P67 boards as this has nothing to do with the SATA ports.

Read above. It's nothing to do with the chipset issues with sandy bridge boards, it's due to the fact I fried the board!Edited by cr33per - 2/23/11 at 8:01am

My mobo ASUS P8P67 EVO rev3.1 is alsow died =(
and I don't check CPU i5 2500K yet ...
F*cking ASUS ! What's going on? This is a soo heavy crash, such huge mistake! Why they don't take back all this P8P67 series from the shops?
I'am very disappointed in ASUS...Edited by crazymActep - 5/22/12 at 1:52pm